老年者の心電圖に關する研究(第3報) : 老年者異常心電圖の豫後
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概要
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A follow-up study was made on 918 aged people during the period of Jan. 1947 to Jan. 1953. The result are as follows : 1) The death rate of those with abnormal electrocardiogram is higher than that of normal electrocardiogram.2) Mortality rate of those with prolongation of the P-Q interval equals that of those with normal electrocardiogram. It can be said, therefore, that prolongation of the P-Q interval is of no significance.3) Mortality rate of those with prolongation of the Q-T interval is 16.2% in the first year and 13.5% in the second year and is higher than that of normal electrocardiogram. Prolongation of the Q-T interval is considered to have some prognostic significance.4) The extrasystole has a similar meaning with prolongation of the Q-T interval in aged persons.5) Mortality rate of those with right bundle branch block equals that of those with normal electrocardiogram or less. Accordingly right B.B.B. has almost no prognostic significance.6) Isolated inversion of the T wave has a great prognostic value. The greater the number of leads with isolated inversion of the T wave, the worse the prognosis becomes. Both Nehb's lead and aV lead seem to have no less a value than standard limb lead. T_<I II> inversion is more important than T_<II III> inversion in determining prognosis, but there is no difference in significance between T_<I II> inversion and T_<I II III> inversion.7) Isolated depression of the RS-T segment is more important than isolated inversion of the T wave. Depression of RS-T_<I II> is more serious than depression of RS-T_<II III>.8) Prognosis of those with abnormal RS-T segment and T wave is not decisively poorer than those with isolated depression of the RS-T segment. So it is clear that abnormal RS-T segment is more important than T wave.9)Mortality rate of auricular fibrillation with abnormal RS-T segment and T wave equals that of abnormal RS-T segment and T wave, so it seems that auricular fibrillation has nothing to do with prognosis.10) Myocardial infarction presents a serious problem, its immediate mortality rate being 26 percent and first year's mortality rate 72 percent. As to the location of the infarction, the highest mortality rate is seen in anteroposterior infarction. There is no difference between anterior myocardial infarction and posterior infarction.11) Summarizing of heretofore discussed prognostic significance of all abnormal electrocardiographic findings, prognostic value is recognized in order of myocardial infarction, the abnormal RS-T segment and T wave, isolated depression of the RS-T segment, isolated inversion of the T wave, prologation of the Q-T interval and extrasystole. Auricular fibrillation, right B.B.B. and prolongation of the P-Q interval have almost nothing to do with prognosis.
- 社団法人日本循環器学会の論文
- 1956-05-20
著者
関連論文
- 老年者の心電圖に關する研究(第3報) : 老年者異常心電圖の豫後
- 老年者の心電圖に關する研究(第2報) : 老年者正常心電圖の悪化率に就いて
- 老年者の心電圖に關する研究(第1報) : 老年者異常心電圖頻度